<template>
  <div>
    <!-- 提示区域 -->
    <a-alert
      style="display:flex;justify-content:center;"
      message="添加商品信息"
      type="info"
      banner
      showIcon
      :closable="false"
    >
    </a-alert>
    <br />
    <!-- 步骤条区域 -->
    <a-steps
      :current="activeIndex - 0"
      final-status="success"
      size="small"
      labelPlacement="vertical"
    >
      <a-step title="基本信息" />
      <a-step title="商品参数" />
      <a-step title="商品属性" />
      <a-step title="商品图片" />
      <a-step title="商品内容" />
      <a-step title="完成" />
    </a-steps>
    <!-- tab栏区域 -->
    <br />
    <a-form-model :model="addForm" :rules="addFormRules" ref="addFormRef">
      <a-tabs v-model="activeIndex" tabPosition="left" @change="tabClicked">
        <a-tab-pane tab="基本信息" key="0">
          <a-form-model-item label="商品名称" prop="goods_name">
            <a-input v-model="addForm.goods_name"></a-input>
          </a-form-model-item>
          <a-form-model-item label="商品价格" prop="goods_price">
            <a-input v-model="addForm.goods_price" type="number"></a-input>
          </a-form-model-item>
          <a-form-model-item label="商品重量" prop="goods_weight">
            <a-input v-model="addForm.goods_weight" type="number"></a-input>
          </a-form-model-item>
          <a-form-model-item label="商品数量" prop="goods_number">
            <a-input v-model="addForm.goods_number" type="number"></a-input>
          </a-form-model-item>
          <a-form-model-item label="商品分类" prop="goods_cat">
            <a-cascader
              :options="catelist"
              expand-trigger="hover"
              placeholder="请选择"
              :field-names="cateProps"
              v-model="addForm.goods_cat"
              @change="handleChange"
              :allowClear="true"
              change-on-select
            >
            </a-cascader>
          </a-form-model-item>
        </a-tab-pane>
        <a-tab-pane tab="商品参数" key="1">
          <!-- 渲染表单的Item项 -->
          <a-form-model-item
            :label="item.attr_name"
            v-for="item in manyTableData"
            :key="item.attr_id"
          >
            <!-- 复选框组 -->
            <!-- 改为attr_value 修复多选框反选消失问题 -->
            <a-checkbox-group
              :options="item.attr_vals"
              v-model="item.attr_value"
            >
              <span slot="label" slot-scope="{ value }">{{ value }}</span>
            </a-checkbox-group>
          </a-form-model-item>
        </a-tab-pane>
        <a-tab-pane tab="商品属性" key="2">
          <a-form-model-item
            :label="item.attr_name"
            v-for="item in onlyTableData"
            :key="item.attr_id"
          >
            <a-input v-model="item.attr_vals"></a-input>
          </a-form-model-item>
        </a-tab-pane>
        <a-tab-pane tab="商品图片" key="3">
          <!-- action 表示图片要上传到的后台API地址 -->
          <a-upload
            :multiple="true"
            :action="uploadURL"
            @preview="handlePreview"
            :remove="handleRemove"
            list-type="picture"
            :headers="headerObj"
            @change="handleSuccess"
          >
            <a-button size="small" type="primary">点击上传</a-button>
          </a-upload>
        </a-tab-pane>
        <a-tab-pane tab="商品内容" key="4">
          <!-- 富文本编辑器组件 -->
          <quill-editor v-model="addForm.goods_introduce"></quill-editor>
          <!-- 添加商品的按钮 -->
          <a-button type="primary" class="btnAdd" @click="add"
            >添加商品</a-button
          >
        </a-tab-pane>
      </a-tabs>
    </a-form-model>
    <a-modal
      title="图片预览"
      :visible="previewVisible"
      width="50%"
      @ok="previewVisible = false"
      @cancel="previewVisible = false"
      okText="确定"
      cancelText="取消"
      ><img :src="previewPath" alt="" class="previewImg"
    /></a-modal>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }
      this.catelist = res.data
      // console.log(this.catelist)
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    async tabClicked() {
      // 判断是否选择了商品分类
      if (this.activeIndex !== '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        this.activeIndex = '0'
        return false
      }
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data
        // console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功的事件
    handleSuccess(info) {
      // 1. 拼接得到一个图片信息对象
      if (info.file.status === 'done') {
        const picInfo = { pic: info.file.response.data.tmp_path }
        // 2. 将图片信息对象，push 到pics数组中
        this.addForm.pics.push(picInfo)
      }
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash   cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_value.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
